Feed-screw-adjusting mechanism.



A. LINDNER.

FEED SCREW ADJUSTING MECHANISM.

APPLICATION FILED AUG-7,1916.

Patented Sept. 4, 1917.

FRED D.

BETHARD, 0F RICHMOND, INDIANA.

FEED-SCREW-ADJUSTING IVIECI-IANISM.

Application ledAugust'?, 1916.

To all whom z' mag/concern: v

Beit known.` that I,` ARTHUR L1NDNnR,a citizen of the Unitedf States, residing in the city ofA Richmond,I in the county ofA Wayne and StateI of Indiana, have-invented anew and useful. Feed-Screw-Adjusting- Mechaf nism, ofA which the following is a full, clear, and comprehensive specifica-tion, being such as will enable others to construct and use the same with exactitude.` i

' The object of this invention, broadly spealzzinggv is to provide a machine element which will be postivein action, strong and durable in construction, easily operated and controlled, andy whiclr canl be manufactured and installed at a comparatively low price.

More specifically stated my object is to provide a feed-screw` adjusting mechanism which4 will eliminate the end' playl of, the screw, which; will enable one to obtain absolute accuracyA in the, work performed thereby,andt which is adapted to compensate for; the weanincidentgteusuage.

Other,A minor objects and particular advantagesA of; the invention will be,` brought out` inL the course of; the followingV description, and that which isnew will be correlated in the appendedv claims.

`Tahe preferredmeans for carrying out the principles of my invention in a; practical manner is shown inthe accompanyingdrawings, in which-Figure l shows my inven tion in` elevation, certain partsthereof being invertical section, and showing the same assembled in operative condition.

Fig. 2 isa right-hand side elevation of the invent-ion.

Fig. 8is a. detailview-showing a side elevation of the hanger, or boss: as stripped ofthe removable parts.

Fig. 4' is an outer face-view handnut alone. And

Fig.` 5 is an outerface viewV ofthe left hand nut alone.

Similar indices denote vlike out the severalviews.`

In order that. the construction, the advantages, and theoperation of my inven tion may be better understood and: appreciated I will now tfke upadetailedfdescription thereof in which I willi set forth the invention as4 fully and as comprehensively as Ilmay.l

of the rightparts through- In the drawings letter A denotes a fixed Specification of Letters Patent.

Iatented 'uept.V d, 1917. Serial No. 113,447.

element, such as the body or.A frame of a machine.

Extending from the element A .is thc hanger or bossB, through the central portion of which. is formed a large round aperture C, the interior of said aperture being smooth or unthreaded.

Also formed through the hanger B are the three smooth bore small apertures D, E and. F, which are spaced an equal distance apart around and concentricwith the aperture C.

The screws l, 2 and 3 are adapted to snugly lit and slide in the respective aper tures D, E and F, extending parallel` with the screw-shaft 4L.` The said screwsshaft eX- tends through the aperture C but not in contact with thehanger orboss B.

Numeral 5 denotes the face nut,.which is preferably round or disk-shape, and it has a` central aperture G therethrough which is interiorly threaded to correspond withl and engage the threads ofthe shaftV I on which it is adapted to be run.` Also formed through the nut 5 are the smooth bore or Unthreaded apertures II', I and'J which are spaced an equalv distance apart around and concentric with they aperture G, andf they register with therespective apertures D, E and F. The screws 11, 2 and 3 are adapted to snugly fit and slide in the-respective aperturesII, I and J Letters K, Il and M denote threaded apertures, formed through thenut 5, and-.1lternating with the apertures I-I, I and J, and they are also concentric with the apertureG.

Numerals, 7 and S denote the three set screws which are threaded into the respective apertures K, L and M, andthey extend vparallelwith the screws l, 2 and 3.

Numeral 9 denotes thebaclrnut; which is of. the same sizeas the nut 5', and `it has-a threaded central aperture N therethrough into which the shaft 4 is adapted toturn. The nut 9 has three apertures O, Pand Q tl'ierethrough which register with the apertures D; E and F, respectively, and also with the respective apertures I-I'. Ii and J, and into which the threadedportions ofthe respectivescrews 1, 2 and 3 `are inserted.

The screw t may be revolved in any well known manner incident to` machine tools, such for instance as grinding machines, for

the purpose of making adjustments and feeding the work or the tool in relation to the work to be performed, in which case the element A would be a part of the body of the machine, while the part B would project therefrom, being either integral therewith or attached thereto as preferred.

After placing the screw 4l through the,

aperture C the nuts 5 and 9 are run onto the screw until they are near the hanger B and located on each side thereof as shown.

The screws 1, 2 and 3, are then inserted through the apertures II, I and J, then through the apertures I), E and F, and then screwed into the apertures O, l? and Q, with the heads of the screws contacting with the face of the nut 5, and the nut 9 contacting with the side of the hanger B, and with the nut 5 spaced from the hanger B, substantially as shown in Fig. l.

It is new evident that by further tightening the said screws that the nut 5 will be forced toward the hanger B until the end play of the screw is taken up or eliminated,

by which it is evident that the screw l may be made as tight as desired, in order to provide a fine adjustment.

After the above it is evident that the setscrews 6, 7' and S, should be run into the apertures K, L and M until their points contact securely with the face of the hanger B which, manifestly, will secure the parts in their adjusted positions, but permitting the screw 4f to revolve and travel to the right and the left, but without lost motion .or end play.

Should the threads of the screw or the nuts wear to any appreciable extent then one has only to first loosen the set-screws 4o and then tighten the screws 1, 2 and 3, thereby bringing the nuts toward each other and thereby taking up all wear of the threads, after which the set-screws are again tightened which will again place the feed-screw in perfect adjustment.

I desire that it be understood that various changes may be made in the several details of construction and arrangement without departing from the spirit of my invention and without sacrificing any of the advantages thereof.

I-Iaving new fully shown and described my invention, what I claim `and desire to secure by Letters Patent of the United States, is-

through said aperture and without contact with the hanger, a face nut located on one side of the hanger and normally spaced therefrom, a back nut located on the other side of the hanger and normally in contact with the hanger, the feed-screw being threaded through both of said nuts, a plurality of screws extending loosely through smooth apertures in the face-nut and the hanger with their heads contacting with the outer face of the face nut and with the other end portions of said screws threaded through apertures in the back nut, a setscrew located between each two of the main screws and located parallel therewith, the same being threaded through the face nut with their points contacting with the hanger whereby the nuts and the feed-screw are prevented from vibrating with relation 'to the hanger and by which back-lash is prevented with relation to the feed-screw, all substantially as shown and described.

2. yA feedescrew `adjusting mechanism, in combination with a hanger having a central aperture therethrough, a feed-screw disposed loosely throughsaid aperture, a face nut located on one side of the hanger, a back nut located on the other side of the hanger, both lof said nuts being threaded onto the feed-screw, screwsextending in an axial direction through both of said nuts and the hanger and adapted to draw the nuts toward each other, and set-screws extending through one of said nutsand adapted to contact with the hanger-to secure the'l parts in adjusted position, all substantially as set forth.

3. A feed-screw .adjusting mechanism, comprising in combination with a hanger having a central' aperture therethrough, a feed-screw disposed `loosely through said aperture, a face nut located onzone sidev of the hanger, a bacl'nut located on, the other side of the hanger, the Vfeed-screw being threaded through both of said nuts, a plurality of screws extending loosely through smooth apertures in the face nut with their heads contacting with the face of the face nut and then extending loosely through smooth apertures in the hanger and with the other end portions of the said screws threaded through apertures in the back nut, and a plurality of set-screws extending through threaded apertures in the face nut with their points adapted to contact with the hanger in order to clamp the back nut against the hanger, all substantially as shown vand described and `for the purposes set forth.

In testimony whereof I have hereunto subscribed my name to this specification in the presence of twosubscribing witnesses.

ARTHUR LINDNER.

Witnesses:

R. E. RANDLE, RoBT. WQRANDLE.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patent v Washington, D. C. Y i 

